Cooking-stove



s. SMITH.

Cooking Stove.

No. 26,298.A Patented Nov. 29, 1859."

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Specicatono' Letters Patent No. 26,298, dated November 29` 1859i i To all 'whom 'it may concern:

Be it known that I, SAMUEL SMITH, ofthe city and county of Philadelphia and `State of Pennsylvania, have invented certainnew and useful Improvements in Cooking- Stoves; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon. y l

My invention consists, firstly, in a grate with hollow bars communicating with each other and arranged in respect to `a perforated boXl situated at the back of `the re place and having zigzag passages, as fully described hereafter, so that the air by traversing up and down the bars before it passes into theiboX and traverses the passages of the latter may be thoroughly heated before it passes through the perforation in the box to assist in consuming the gaseous products of combustion; secondly, 1n certain plates arranged as described hereafter so as to serve the double purpose of connecting together the hollow bars of the grate, and of forming a chamber for heating the air prior to the same being discharged in jets onto the front of the fire.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawing which forms a part of this specication, Figure l is a sectional elevation of my improved cooking stove. view.` Fig. 3, a transverse sectional elevation on the line `1*-2, Fig. l. Fig. 4, the same on the line 3--4 Fig. 1. Fig. 5, a section ofthe grate on the line 5 6 F ig..3. Fig. 6, a transverse section of one of the bars of the grate, drawn to the full size.

Similar letters refer to similar parts throughout the several views.

A, represents the side, front and back plates, B, the top plate, and C the bottom plate of the outer casing of my improved cooking stove, D the oven, E the fire place, F the ash pit, G the grate, I the upper Hue, Jthe lower flue, K the rear line, and I-I the exit opening communicating with the chimney.

The grate G, is of the curved form common to the grates of ordinary cooking stoves and occupies the usual position in respect to the oven, the iire place, and the Fig. 2, a front` ash pit, the gratehowever isimade l separate pieces connectedwtogether, per piece m, :fitting onto `the lower as seen in Fig.l6, land both `pieces being` constructed and combined as to,` form holl bars. The vertical .portionof:theholl i rests against `the` inside of `hefrontplate` of the stove in wlliclrare:twoiholes and f The hole z' fcomm in'cates `the end bar y', .(Fig.,1 filth hole i withthe hollow en 7 1 ternal air entering thehole z passes d hollow bar y' along a passage/l; to the hollow il bar Z, upwardthroughithe latteralongithe passage g, into theshollow bar` pand down;` this barlinto the hollowiback L of the` fir place. The air enteringgthe hole Qtr ferses the bar j', passage bar Ze', passage ga from which it also escapes into the hollow t back L of the re place.; ,i l l 'l It will be seen on reference to Fig. 5, that the several bars of the grate are connected together at the top by the two platesrand 3,1 between which is a chamber open atthe bottom for the free admission of` air andzcoInmunicating through small holest with` the interior of the fire place (see Fig. This` chamber is separated.frolnktheiinteriorlofj` n the bars and their communicating passages), by suitable partitions, soythat the air :which` traverses the bars cannot gainaccess tothe air chamber between the platesir and s! y The hollow backfL offthe fireplaoefha several partitions `u, forming azigzag lpas sage which communicateswith a horizonta passage `or chamber lo, the `latter` communieating through a series of {perforations with` the fire-place so that thelair `which passes from the hollow bars 72 andlp, through the` openings w, (Fig t) `into*tllehollow back, must traverse thef zigzag` passage before it can 'escape into` the fireplace through the above mentioned ]oerforations.

In the ash pitFl iits a pl tea y p forming` a y chamber M into `whichVthe air passes i through openings in frontjof the ash `pit said openings being covered byaslideso` that the admission ofair ,Inaybeiregggulated` or entirely cut ofat plea-sure.` i -p The chamber M commui icates through :a number of openings `with another chamber N, situated beneaththe grate and communieating either withthehollow back; or with `1 the external air through openings at the` sides of the stove.` y p l By the peculiar construction of the grate the air must traverse the several bars before it can enter the hollow back and as it is retarded in its passage through the latter it must become heated to suchl a degree, that when it passes through the perforations in the top of the back it serves efficiently to ignite the carbon intermiXed with the products of combustion arising from the fuel.

Independent of the jets of'heated air discharged into the fuel in the rear of the fire place, similar jets for a similar purpose are discharged from the hot air chamber between the two plates 1' and s which serve to connect the hollow bars together.

By making the hollow grate in two pieces m and n (Fig. 6) the upper piece when injured by close contact with the fire may be removed and replaced by a new upperV piece, the lower piece being preserved entire for a length of time by being further from the fire and having air constantly passing in contact with it. Y Y

By the air chambers M and N, and hollow back L, the oven is relieved from that eX- cessive heat which the fire ,places of this `Class of stoves impart to the front of the oven, the three chambers serving to separate Y the fire place from the oven.

2.The plat-es r and s of the grate G,

when arranged as specified so as to serve the double purpose of connecting the bars of the grate together and forming a chamber for heating the air preparatory to the same being discharged in jets into the front of the j fire.

In testimony whereof, I'have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL SMITH.

Witnesses HENRY HoWsoN, CHARLES D. FREEMAN. 

